<template>
  <view>
    <view class="search-box">
      <!-- 搜索建议uni组件框 -->
      <uni-search-bar  @input="input" :radius="100" cancelButton="none"></uni-search-bar>
      <!-- 搜索建议列表 -->
      <view class="sugg-list" v-if="searchResults.length!==0">
        <view class="sugg-item" v-for="(item,i) in searchResults" :key="i" @click="gotoDetail(item.goods_id)">
          <view class="goods-name">{{item.goods_name}}</view>
          <uni-icons type="arrowright"  size="16"></uni-icons>
        </view>
      </view>
      <!-- 搜索历史 -->
      <view class="history-box" v-else>
        <!-- 标题区域 -->
        <view class="history-title">
          <text>搜索历史</text>
          <uni-icons type="trash" size="17" @click="clean"></uni-icons>
        </view>
        <!-- 列表区域 -->
        <view class="history-list">
          <uni-tag :text="item" v-for="(item,i) in histories" :key="i" @click="gotoGoodsList(item)"></uni-tag>
        </view>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        //记录定时器调用返回的id
        timer: null,
        //搜索框输入的值
        kw: '',
        //搜索结果列表
        searchResults: [],
        //搜索关键词的历史记录
        historyList: []
      };
    },
    onLoad(){
      this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
    },
    methods:{
      input(e){
 
        clearTimeout(this.timer)
        this.timer = setTimeout(()=>{
          this.kw = e
          this.getSearchList()
        },500)
      },
      async getSearchList(){
        if(this.kw.trim().length===0){
          this.searchResults = []
          return
        }
        const {data: res} = await uni.$http.get('/api/public/v1/goods/qsearch',{query:this.kw})
        if(res.meta.status!==200) return uni.$showMsg()
        this.searchResults = res.message
        this.saveSearchHistory()
      },
      gotoDetail(goods_id){
        uni.navigateTo({
          url: '/subpkg/goods_detail/goods_detail?goods_id=' + goods_id
        })
      },
      saveSearchHistory(){
        // this.historyList.push(this.kw)
        const set = new Set(this.historyList)
        set.delete(this.kw)
        set.add(this.kw)
        this.historyList = Array.from(set)
        uni.setStorageSync('kw', JSON.stringify(this.historyList))
      },
      clean(){
        this.historyList = []
        uni.setStorageSync('kw', '[]')
      },
      gotoGoodsList(kw){
        uni.navigateTo({
          url: '/subpkg/goods_list/goods_list?query='+kw
        })
      }
    },
    computed:{
      histories(){
        return [...this.historyList].reverse()
      }
    }
  }
</script>

<style lang="scss">
.search-box{
  position: sticky;
  top: 0;
  z-index: 999;
}
.sugg-list{
  padding: 0 5px;
  .sugg-item{
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 13px 0;
    border-bottom: 1px solid #efefef;
    .goods-name{
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      font-size: 14px;
      margin-right: 3px;
    }
  }
}
.history-box{
  padding: 0 5px;
  .history-title{
    display: flex;
    justify-content: space-between;
    height: 40px;
    align-items: center;
    border-bottom: 1px solid #efefef;
  }
  .history-list{
    .uni-tag{
      margin-top: 5px;
      margin-right: 5px;
    }
  }
}
</style>
